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15. A two-digit positive number is such that the ones
digit is 2.5 times as much as the tens digit. If the
difference between the number and the number
obtained when the digits are reversed is 27, find
the number.

The number is 52 or 25.

Step-by-step explanation:

The photo has the full solution

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.